Great to hear from basjoos. You have actual daily driver experience of living with a boat tail. I'm curious of the driving (handling) dynamics of the added weight of your tail. But I presume that the other aero additions may have counter balanced the rear weight bias of the added tail.
As for cutting out the rear bulkhead just for interior visual 'referencing' may structurally weaken the monocoque shell. Crash worthiness compromised. Structural tube cages add weight. Exhaust gases has to be completely sealed out. An alternative is to keep intact the existing rear hatch (accessible by power actuator locks) and add another lockable hatch to access storage in the new boat tail space. Rear sensors are beneficial & easily integrated to any 'tail'.
Especially for many 'new' (auto bloggers & reporters) drivers who wanted to test drive this boat tail.
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